If you want to have a crowd-pleasing special effect at your Halloween event consider using inexpensive LCD monitors and an Ikea frame to create the illusion of a disembodied face staring out of the mirror.

Instructables user DavidAndora created an effect using three monitors along a single wall with the video synced so that the face only appeared in one frame at a time. To create the illusion he purchased an inexpensive 19-inch LCD monitor and attached it to an Ikea Ung Drill frame and then created a wall mount from a sheet of plastic to match the design of the frame and hide the dimensions of the display. He then painted everything in a fluorescent color and had the image lit by UV light to help complete the illusion. The video of the disembodied head is a friend wearing a black t-shirt over his neck so that only his face is visible.

Once the display is constructed and the video shot all you need to do is properly light the display and play the video on a loop. If you want to have multiple displays then you also need to account for syncing. The Instructables author used Final Cut to create three DVDs, each slightly delayed so that when playing the three DVDs at the same time the footage of the mysterious face only appears on one display at a time.